Research on an authoring environment and integrity management for multimedia databases

在本研究中，我们研究了基于xml的信息系统的体系结构，它具有超文本系统的灵活性和可操作性。该体系结构还旨在为完整性约束和多媒体信息提供管理功能。本课题的研究成果如下：1。多媒体信息的三维图形质量改进。我们已经提高了多媒体信息的三维图形显示的质量。基于web的信息系统的设计与实现。为了解决多媒体信息在网络系统中无缝使用的问题，我们设计并实现了灾害信息共享系统ONIGIRI。在这个实现中，我们澄清了终端用户不容易将多媒体内容上传到服务器的问题。在视频内容的使用中，为了减少网络流量和磁盘I/O的工作量，需要将客户端访问合理地分布在视频服务器之间。因此，我们研究了在基于linux的集群计算机上构建视频服务器的基本实验。为了在网络分布式环境下创建包括视频数据在内的超媒体内容的XML （SMIL格式）文档，我们设计并开发了一个SMIL编写工具。此外，我们还开发了视频内容的基本访问控制设施。

In this research, we have investigated the architecture for XML-based information systems which have flexibility and operability as hypertext-systems. This architecture also aims for management facility for integrity constraints and multimedia information. The results of this research project are the followings ;1. Quality improvement in 3D graphics for multimedia information.We have improved the quality of 3D graphics presentation for multimedia information.2. Design and implementation of a Web-based information system.In order to clarify the problems to use multimedia information seamlessly in Web-based systems, we have designed and implemented, ONIGIRI, an information shareing system for disasters. In this implementation, we have clarified the problem that end-user can not easily upload the multimedia contents to the server.3. In usage of video contents, it is necessary that the client accesses should be properly distributed among video servers in order to decrease the workload of network traffic and disk I/O.Thus, we have investigated on the basic experiment to construct a video server on a Linux-based clustered computer.4. Development and usage environment for hypermedia contentsIn order to create a hypermedia content, including the video data, as XML (SMIL format) documents on the network distributed environment, we have designed and developed a tool for SMIL authoring. And, we have also developed the basic access control facility for video contents.